The standard technique of analyzing solar photometer data to determine atmospheric optical depth and the spectral solar constant is shown to inadvertently weight the data unequally. A new approach is proposed which equally weights all the data. Assuming that the deviations of the data points result from real random variations of optical depth during the period of the measurements, this latter approach is shown to yield more reliable results.
© 1981 Optical Society of America
B. M. Herman, M. A. Box, J. A. Reagan, and C. M. Evans, "Alternate approach to the analysis of solar photometer data," Appl. Opt. 20, 2925-2928 (1981)